For nearly four hundred years, power has belonged to whoever controls territory. Draw a line on a map, put an army behind it, and you have a sovereign state. That Westphalian bargain shaped the modern world so completely that we stopped noticing it was a design choice rather than a law of nature.Look around now and ask where power actually lives.The maps still show countries. But the systems your daily life depends on-the cloud that holds your files, the payment networks that move your money, the satellite constellations that locate your phone, the AI systems that mediate knowledge, the platforms that govern speech-are controlled by a handful of corporations. These companies do not need to become states. They become functionally sovereign by controlling the infrastructure upon which states and populations depend.This book names the emerging order infrastructural feudalism.It traces how the corporation, originally a legal tool chartered by states, escaped territorial control through mobile capital and planetary-scale systems. It develops a framework of five layers of corporate sovereignty-economic, infrastructural, informational, security, and cognitive-and shows how AI accelerates the transformation by allowing corporations to become increasingly autonomous. It takes the feudal analogy seriously: overlapping authorities, layered identity, exit as the last form of political power, and the possibility of both corporate serfdom and competitive private governance.From company towns and private arbitration to app stores, satellite networks, and frontier AI models, the signs of quasi-sovereignty are already visible. The book explores why space may host the first genuinely sovereign corporate entities, the mutual dependency between states (which still have guns) and the infrastructure they cannot function without, and three possible futures: a corporate renaissance of competing jurisdictions, a corporate feudal order of permanent lock-in, and a decentralized future in which the infrastructure itself becomes hard to own.The central question is disarmingly simple: what happens when the people who control the infrastructure become more important than the people who control the territory?The next feudal lord may not own a castle. He may own the server farm, the satellite constellation, the power plant, and the intelligence running all three.This is speculative political analysis written for clarity and urgency. Some of what it describes is already happening. Some of it may never happen. The value of the exercise is preparation before the map finishes changing.